Glass formation of ternary Sm-based Sm-Al-Co bulk metallic glasses  

作　　者：Jiang Wu1), Qing Wang1), Weirong Chen1), Qingyu Zhang1), Jianbing Qiang1), and Chuang Dong1,2) 1) State Key Lab of Materials Modification, Dalian University of Technology, Dalian 116024, China 2) International Center of Materials Physics, Chinese Academy of Sciences, Shenyang, 110016, China 

出　　处：《International Journal of Minerals,Metallurgy and Materials》2007年第S1期50-53,共4页矿物冶金与材料学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China (No.50401020, 50671018 and 50631010);the Provincial Science and Technology Foundation of Liaoning (No.20061067).

摘　　要：Ternary Sm-based Sm-Al-Co alloys at specific compositions designed using an e/a- and cluster-related criteria exhibit high glass forming abilities and form bulk glassy rods of 3 mm in diameter by a copper mold suction-casting method. Four composi- tions of bulk metallic glasses (BMGs) are Sm50Al25Co25, Sm52Al24Co24, Sm54Al23Co23 and Sm56Al22Co22, which all satisfy a constant conduction electron concentration of 1.5. Among them, the BMG exhibiting the largest reduced glass transition temperature (Trg) is Sm50Al25Co25, which reaches 0.648. The glass transition temperature Tg and the onset crystallization temperature Tx of this alloy are respectively 579 and 640 K at a heating rate of 20 K/min.Ternary Sm-based Sm-Al-Co alloys at specific compositions designed using an e/a- and cluster-related criteria exhibit high glass forming abilities and form bulk glassy rods of 3 mm in diameter by a copper mold suction-casting method. Four composi- tions of bulk metallic glasses (BMGs) are Sm50Al25Co25, Sm52Al24Co24, Sm54Al23Co23 and Sm56Al22Co22, which all satisfy a constant conduction electron concentration of 1.5. Among them, the BMG exhibiting the largest reduced glass transition temperature (Trg) is Sm50Al25Co25, which reaches 0.648. The glass transition temperature Tg and the onset crystallization temperature Tx of this alloy are respectively 579 and 640 K at a heating rate of 20 K/min.

关 键 词：Sm-based alloys bulk metallic glasses alloy design cluster line electron concentration 

分 类 号：TG139.8[一般工业技术—材料科学与工程]